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Heart racing is often a symptom of heart disease, explains WebMD. Some of the heart ailments that cause heart palpitations include congestive heart failure, coronary artery disease and heart valve problems.

Food sensitivity may cause heart palpitations in certain individuals, notes WebMD. It is common after consuming foods that are rich in carbohydrates, sugar, nitrates or sodium. In other situations, palpitations are a result of emotional conditions such as anxiety and stress. Palpitations are common during panic attacks. Generalized anxiety disorder and post traumatic stress disorder may also cause heart racing symptoms, according to Healthline.

Heart palpitations may also be a sign of a drug allergy, notes Healthline. This is when the immune system recognizes a drug as a foreign substance and tries to eliminate it from the body. The racing heartbeat may also be as a result of dehydration.

Hormonal changes that happen during pregnancy and menopause may sometimes cause heart racing symptoms, explains the National Heart, Lung and Blood Institute. Heart palpitations in pregnancy may be a result of anemia.